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The Deck

Thomas Mather (Seven of Diamonds from Iowa)

21 Jan 2026

Transcription

Chapter 1: What is the story behind Thomas Mather's unsolved homicide?

3.98 - 30.856 Ashley Flowers

Our card this week is Thomas Mather, the Seven of Diamonds from Iowa. Nothing causes the true crime community to stir more than a case with an open-ended question of did he or didn't he? Well, except that is when the question is, did she? For longer than 32-year-old Thomas Mather was alive, a rural town in Iowa has been haunted by its only unsolved homicide.

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31.297 - 92.217 Ashley Flowers

The former sheriff told us it's the only whodunit they have left. Does no foreign DNA evidence and strange behavior mean that Dawn Mather had to have been involved in killing her husband? Or does an unidentified fingerprint and tire tracks prove she didn't? I'm Ashley Flowers, and this is The Deck. The sun set in Springdale, Iowa at 6.53 p.m. on September 30th, 1991.

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93.318 - 109.532 Ashley Flowers

So by 8 p.m., it was pitch black outside of Mark Raymond and Mary Buckley's rural home when they heard a noise at their back door. Now, when the couple opened the door, they were shocked to see a naked woman in front of them, 24-year-old Dawn Mather, their neighbor who lived just down the way.

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110.172 - 130 Ashley Flowers

Now, before they had a chance to ask Dawn what was happening, she told them, "'There's a man in our house that has a gun.'" Mark and Mary immediately took Dawn inside, locked the doors, covered Dawn with a robe, and called for help. While EMTs and even a few of Dawn's friends rushed to where Dawn was, law enforcement was sent to the Mather house.

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130.781 - 156.596 Ashley Flowers

Sheriff's deputies were worried that the farmhouse, close to 100 yards away, might still shelter the gunman with Dawn's husband, 32-year-old Tom Mather. Now-retired Deputy Dale Edens was one of the first people to arrive. He immediately got on his loudspeaker and ordered everyone outside. There was no movement from inside the house. The deputies had a dispatcher try calling the landline inside.

157.017 - 180.9 Ashley Flowers

They could hear it ring and ring. And when no one answered, they decided it was time to go in. When backup arrived, they approached the front door. And Deputy Edens could see that it had been left wide open. Only the screen was closed. But inside, everything was still. And they didn't even have to open that screen door before they knew what they were really dealing with.

180.88 - 207.377 Ashley Flowers

Not a hostage standoff, but a homicide. Just inside the house, Tom was laid out on the living room floor on his back with his hands and feet each bound with two different types of rope. One nylon and the other something like a red, white, and blue jump rope. And no one had to question whether or not he was still alive. The cut to his throat from ear to ear made it clear that he was beyond saving.

209.534 - 226.277 Ashley Flowers

Keith Whitlatch was serving as the sheriff 34 years ago at the time of Tom's murder, and our team got a chance to sit down with him. Even at 88 years old, he said this case sticks with him. And he knew from day one that this was going to be big, bigger than his department could handle alone.

227.32 - 239.811 Former Sheriff Keith Whitlatch

One of the first things I'd done was to call the Iowa Division of Criminal Investigation. They've helped us on our murder cases and I'm a firm believer that they've got the expertise

Chapter 2: What events unfolded on the night of September 30, 1991?

292.424 - 313.094 Tom Mather

Okay, my husband and I were watching television and we heard the dog barking and I assumed it was my dad who was always dropping by and this guy came in and he had a gun and he says, this is a hold up, this is a stick up, get down on the floor. So my husband got down on the floor, and the guy had no clothes on except tennis shoes.

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314.055 - 331.965 Tom Mather

And at first, I thought he was wearing a, like, pantyhose or something over his face, you know? But I don't know whether he took them off, or it was just my imagination that he was wearing them, because later on, he didn't have them on. Um, he got my husband down, told me to come over...

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332.165 - 351.412 Tom Mather

He gave me some rope and told me to tie my husband up, and I tried to tie my husband up, but obviously I was fairly upset and wasn't doing a good enough job at it, I guess. He just told me to go sit away from my husband a little bit and he tied my husband up. Tied his hands back behind his head like they do, you know, on the police shows.

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352.213 - 369.141 Tom Mather

And then he tied his feet up and made him kind of inchworm down the hall into the bedroom and made me go into the bedroom. And then he, you know, he had a gun and he kept telling us that, you know, do what he says or I'll blow your head off or I'll kill you or I'll shoot you or...

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369.121 - 394.808 Ashley Flowers

different variations of that and uh after he got us back into the bedroom he told my husband that he was going to rape me and make my husband watch dawn goes on to describe in detail how the man forced her to take off her clothes and what he made her do after but no matter what sex act he tried to force on her or make her perform dawn said that he was not able to perform

396.121 - 420.563 Tom Mather

He couldn't get an erection. So he told me to roll over and I did. And he used, we had some clothes laying around the bedroom, used those to tie me up and then he took my husband back out into the bedroom. He told me not to move or else he'd shoot my husband. And then my husband started screaming and yelling and I started screaming, don't hurt him, you know, please don't hurt him.

421.285 - 442.208 Tom Mather

And started trying to get free and I managed to get free and I started to run up or down the hall, out to the living room and my husband yelled, run, run, so... The way out the house is, um, our bedroom is in the back, and then the hallway goes out toward the living room, which is in the front of the house, and there's an entryway into the garage about halfway in between.

442.95 - 448.38 Tom Mather

So I just ducked out that way, through the garage, and ran for help to the neighbors across the way.

449.282 - 453.651 Dawn Mather

Okay. The articles he tied you up with, do you know what specific articles those were?

Chapter 3: What evidence was collected at the crime scene?

758.226 - 764.372 Sheriff Warren Weathington

If I remember right, there was a cut, I think, on his left jaw above the large wound.

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765.514 - 790.722 Ashley Flowers

The large wound Sheriff Weathington mentioned was the deep gash just above Tom's Adam's apple. According to the medical examiner's report, the cut was so deep it could have been fatal on its own. But still, the assailant chose to shoot Tom. Was he just angry that Don was getting away and his plan, whatever it was, was ruined? Or was there some personal emotion fueling his rage on Tom?

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791.363 - 796.011 Ashley Flowers

The latter was a little hard to believe the more they learned about Tom Mather.

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796.953 - 808.393 Former Sheriff Keith Whitlatch

He was liked in the community. I mean, his father was well-liked and Tom was too. I mean, he was just, I guess nobody disliked him. You know, he was just an easygoing kid.

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808.413 - 817.408 Ashley Flowers

This was echoed by Tom's cousin, Catherine Siegel. She grew up visiting her older cousin regularly and has fond memories of their time together.

818.367 - 832.596 Catherine Siegel

He was such a bright light and always had a great sunny disposition. And he would walk into my grandma's house with a big old smile on his face and give us big hugs, very warm and welcoming.

833.521 - 850.847 Ashley Flowers

By all accounts, Tom seemed like an all-around good guy who lived an unassuming life. He worked a steady custodial job at the University of Iowa, where he used the campus gym to lift weights. Everyone we spoke to told us that Tom had some kind of unspecified learning disability.

851.528 - 870.436 Ashley Flowers

His cousin Catherine thought that it might have been dyslexia, but it didn't affect his social functioning or the way he moved through the world. He and Dawn had just celebrated their one-year wedding anniversary the month before, though they'd been together for years before that. And from what investigators were told, it appeared to be a happy, affectionate relationship.

871.157 - 889.207 Ashley Flowers

The two didn't have a ton of time to spend together. Tom worked nights, Dawn days. But that actually was about to change. Until then, the main time that they had together was on the weekends, and then that window of time on weekdays after Dawn got home and before Tom left. That's when they would eat dinner and watch their favorite shows together.

Chapter 4: What inconsistencies were found in Dawn Mather's account?

1374.033 - 1400.98 Ashley Flowers

But even in the small town, no one could name this mystery man. So with all the gossip swirling around, investigators did what they often do. A week after Tom's death, they asked Dawn to take a polygraph. She did. And she failed. Questions about whether she knew who shot Tom or if she had any role in planning his death registered as deceptive.

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1401.314 - 1426.191 Ashley Flowers

When investigators confronted her, Dawn broke down and said, quote, well, they'll just have to prove it. Then she walked out. She hasn't spoken to investigators since. Detectives kept their suspicions about Dawn under wraps, at least publicly for the time being. Because the truth was, no matter what their gut was telling them, the physical evidence was telling them something else.

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1426.171 - 1441.792 Ashley Flowers

There were unidentified prints collected from the Mather home. And I know everyone says now that they're suspicious of the fact that Dawn's feet weren't cut up more. But at the time, it seems like nobody even bothered to confront her about this. There's nothing in the case file and transcripts that we've seen.

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1441.832 - 1455.62 Ashley Flowers

And when our reporter asked former Sheriff Whitlatch if Dawn was ever questioned about this, frustratingly, the answer was, I don't know. They also couldn't locate a gun in the home or anywhere else that matched what Tom was killed with.

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1456.181 - 1479.634 Ashley Flowers

And in all their canvassing of the neighborhood, they actually had a number of conversations with locals, including neighbors and people who drove through the area, some of whom relayed a number of stories about an unidentified man who was in the area the night of September 30th. For example, one witness reported seeing a tall, slender man in tan overalls near the Mather home.

1480.593 - 1503.057 Former Sheriff Keith Whitlatch

We had reports of people seeing a man walking from the cornfield north of the farm curdleage, I mean, buildings, and carrying a round cylinder object on his shoulder towards the house. And we could never identify who that person was or what he was carrying or where he went.

1503.863 - 1521.433 Ashley Flowers

Another report came from the Mathers' closest neighbor. This was actually the first house that Dawn had run to for help, but when no one answered the door quick enough, Dawn said that she ran to the next house that was Mark and Mary's. But as it turns out, that first neighbor was home. She was just too scared to answer the door.

1521.413 - 1542.134 Ashley Flowers

But about an hour after Dawn had come looking for help, this same neighbor said that she saw a blondish, lighter-haired man wearing jeans approach her back porch and like rattle the door handle. Terrified, she grabbed her son and ran to the bedroom and called the sheriff's office. Now, investigators didn't ignore these leads.

1542.634 - 1565.95 Ashley Flowers

Starting on the 30th, they conducted an exhaustive overnight search with a four-mile radius of the Mather farmhouse, looking for anyone who fit these descriptions. Fifty law enforcement officers from about 10 different agencies, search dogs, and a helicopter were brought in. But as Tom's cousin Catherine explained, a manhunt in Iowa during corn harvest season proved to be difficult.

Chapter 5: How did investigators react to the rumors surrounding the case?

1920.338 - 1933.892 Dave Baranek

Well, it actually started out in conversation just between the wives. I got the impression it came up in the car when they were driving back from work. I wasn't there, and then later it was just sort of like they chuckle every now and then and it finally came out in general conversation, okay?

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1934.873 - 1944.203 Dave Baranek

You know, it's like if you know something would happen to Tom or something happened to my wife, you know, it's like, you know, we could get together or whatever, you know, as a joke. Mm-hmm.

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1945.567 - 1968.106 Ashley Flowers

Dave said this conversation happened six to eight months earlier, and he blew it off as a joke. Apparently satisfied with the response, the investigator asked Dave if there were any other men in Dawn's life. Dave said no. He insisted that Don loved Tom and offered no alternative names. So investigators shifted their attention to Dave's firearms.

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1968.747 - 1990.739 Ashley Flowers

He admitted to having three weapons, his late brother's .22 Ruger 10-22 rifle, a single-shot .22 rifle, and a six-shot .22 revolver loaned to him by his friend Chris Piper. All three could possibly fit their murder weapon. Now, what stood out in Dave's interview is what didn't happen.

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1991.44 - 2012.551 Ashley Flowers

Even after telling Dave in the interview that he was their only suspect, investigators didn't press him about his relationships with Tom and Dawn. And there were no challenges to his casual dismissal of the months-long joke about Dawn wanting him. Investigators did interview his wife Amy, though. Maybe they were saving the tougher questions for her.

2013.232 - 2033.392 Ashley Flowers

And her interview was as surprisingly honest as Dave's. According to the transcript, she told them Dave and Dawn got along real good and that Dawn would jump Dave in a minute if she wasn't with him. Amy recalled conversations with Dawn about the possibility of Dave and Dawn dating. having each other if something were to happen to her or Tom.

2034.013 - 2055.961 Ashley Flowers

But even as Amy cast doubt on her husband, she handed him a lifeline in the form of an alibi. She told investigators that they were home that evening. Amy was in the bath while Dave was watching Teenage Mutant Ninja Turtles. She estimated that she was in the tub from about 7.40 p.m. to 8.40 p.m., and she could hear the TV from the bathroom.

2056.542 - 2067.981 Ashley Flowers

What she couldn't say, though, was that she ever saw Dave. Amy told investigators that she never left the bathroom, therefore she never physically put eyes on him watching television.

2067.961 - 2088.556 Ashley Flowers

However, both of them said that the way they'd found out about the incident and had known to go be with Dawn was because Dave's mother had overheard a call from dispatch on the police scanner and she rushed over to tell them. This account would make it hard to believe that Dave could go to the Mathers, kill Tom, get home, clean up, and be sitting down watching Ninja Turtles like nothing happened.

Chapter 6: What theories emerged about the possible suspects in Tom's murder?

2560.323 - 2573.809 Ashley Flowers

Because until investigators identify the man that brutally murdered Tom Mather, the possibility of a stranger cannot be dismissed, at least not to me. But that's not quite how Sheriff Weathington sees it.

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2574.835 - 2605.703 Sheriff Warren Weathington

I think, in my opinion, the fact that there's no DNA has been found of anybody that shouldn't be in the house. All the DNA we've found has been DNA of people who belong in that house. And I think that says a lot, too. There's no DNA in that house that would have been a strange man who entered the house naked.

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2605.743 - 2631.433 Ashley Flowers

Sheriff Weathington's point is that if a naked stranger entered the Mather farmhouse, there should be some foreign DNA evidence somewhere. But of the evidence that has been tested, it all seems to belong to everyone who belonged in that farmhouse. But more is being tested as we speak. The sheriff's office has submitted DNA evidence for new testing, and they're waiting on the results.

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2632.193 - 2650.371 Ashley Flowers

Sheriff Weathington couldn't share the details about which items were resubmitted, but the office did confirm that they have kept the physical evidence, including the rope that Tom was bound with and the bloody knife. In addition to retesting forensic evidence, former Sheriff Whitlatch believes that there are other avenues to solve this case as well.

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2651.11 - 2667.214 Former Sheriff Keith Whitlatch

Well, I'd like the public to know that somebody drove by and saw those vehicles, more than one person. And if they can come forward and say who they saw carrying that pipe, well, that would give you a lot to go on.

2668.556 - 2677.81 Ashley Flowers

Catherine told our reporter that the town hasn't been the same since her cousin died. And even decades later, the unsolved case still haunts former Sheriff Whitlatch.

2678.802 - 2710.602 Former Sheriff Keith Whitlatch

Oh, I would love to see it solved, because I've had seven murders while I was sheriff, and this is the only totally whodunit left. So I would like to see it solved. You know, you look at the pictures of Tom there, and nobody deserves to die that way, you know. Couldn't find anybody that doesn't like Tom. And so he wasn't being punished for being a big bully or a villain.

2710.622 - 2721.415 Former Sheriff Keith Whitlatch

He wasn't a barroom brawler or something like that. So, you know, it just shouldn't happen. So, yeah, I'd love to see it solved.

2722.475 - 2727.324 Ashley Flowers

One thing is for certain, the sheriff's office is not going to forget about Tom's case.

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